Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Encoded Ignition Key
When ignition is in start or run, PATS module initiates the encoded ignition key interrogation process. PATS module supplies both power and carrier signal to transceiver module to momentarily energize ignition key. After energize period has expired, key transmits its identification code to transceiver module. This encoded ignition key is much larger in size to accommodate the electronics located inside plastic cover.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.